SCHOOL PURPOSE AMPLIFIER

The world over the decade's has made considerable advancement in automation ,automation is employed in home ,industries, commercial & educational sector. In this work ,a microcon troller base automatic school bell timer amplifier is design.When school or collage start the n amplifier is ON & play's the N ational anthem after this the amplifier off automatically & after every period the buzzer play through the speaker. When the last l ecture is fini shed then the national song ( "V andemataram") is play through the amplifier. Then operation is done without any human intervention so we get high degree of accuracy. This kit contains eight different timing interval in only one ic . The timing modes & delay ranges are selected by on board push on switch's. Simply s elect the time delay you want . Timer can display the real time clock in 24 hour mod e.